Corrugated hose assembly

Abstract

According to the present invention, there is provided a hose assembly with an inner fluoropolymer layer having a somewhat smooth inner surface and an outer polyamide layer having an undulated surface.

1. A method of making a hose assembly including the steps of:
 extruding into a tube shape a tubular smooth inner fluoropolymer layer having a substantially smooth inner surface; 
 forming an a substantially continuous jacket having a substantially smooth outer surface over the inner fluoropolymer layer while adhering said jacket and said inner layer together; and 
 corrugating said jacket after said forming step, said corrugating step further defined as etching the corrugation on the jacket so that said outer surface has undulations. 
 
   
   
     2. The method as set forth in  claim 1 , wherein forming a smooth inner fluoropolymer layer comprises forming an inner fluoropolymer layer with a substantially smooth inner surface. 
   
   
     3. The method as set forth in  claim 1 , wherein forming a jacket over the inner fluoropolymer layer comprises extruding the jacket over the smooth inner fluoropolymer layer. 
   
   
     4. The method as set forth in  claim 1 , further characterized by depositing at least one braided layer between said inner and said jackets. 
   
   
     5. The method as set forth in  claim 1  said corrugating step further defined as forming a spiral corrugation on the jacket. 
   
   
     6. The method as set forth in  claim 1 , said corrugation step further defined as forming a circular corrugation on the jacket. 
   
   
     7. The method as set forth in  claim 1 , wherein said corrugating step includes injection molding the corrugations to the hose assembly. 
   
   
     8. The method as set forth in  claim 1 , wherein said extruding step comprises extruding the tube shape melt extrusion. 
   
   
     9. The method as set forth in  claim 1 , wherein said extruding step comprises extruding the tube shape paste extrusion. 
   
   
     10. A method of making a hose assembly including the steps of:
 extruding into a tube shape a tubular smooth inner fluoropolymer layer; forming a substantially continuous jacket over the inner fluoropolymer layer while adhering said jacket and said inner layer together; and corrugating said jacket, said corrugating step further defined as etching the corrugation on the jacket. 
 
   
   
     11. The method as set forth in  claim 10 , said corrugation step further defined as forming a circular corrugation on the jacket. 
   
   
     12. The method as set forth in  claim 10 , wherein said corrugating step includes injection molding the corrugations to the hose assembly. 
   
   
     13. The method as set forth in  claim 10 , wherein said extruding step comprises extruding the tube shape paste extrusion. 
   
   
     14. The method as set forth in  claim 10 , said corrugating step further defined as forming a spiral corrugation on the jacket.